environment-triage

SKILL.md

Environment Triage

When uv sync or pip install behaves unexpectedly, check the actual interpreter.

Pattern

System Python is not authoritative if uv/venv selects a different interpreter.

DO

# What uv ACTUALLY uses
uv run python --version

# What's pinned (this controls uv)
cat .python-version

# Confirm package is installed
uv pip show <package>

Confirm import works in uv context

uv run python -c "import ; print(.version)"

## Common Fix

If optional deps require Python 3.12+ but .python-version is 3.11:

```bash
echo "3.13" > .python-version
rm -rf .venv && uv venv && uv sync --all-extras

DON'T

Trust python3 --version when using uv

Assume install succeeded without verifying import

Debug further before checking interpreter version

Source Sessions

2243c067: symbolica-agentica skipped due to python_version >= 3.12 marker, but uv was using 3.11

4784f390: agentica import failures traced to wrong interpreter